After the release of the dash cam video showing the arrest of Sandra Bland just three days before she was found hanging in her prison cell, debates have raged regarding whether the video was edited, and whether her death was suicide or murder.

New reports from the Waller County sheriff’s office indicates that while being booked, Bland told jailers that she previously attempted suicide in 2014.

Bland’s mental state still remains under investigation by officials, but she went through a...